https://en.wiktionary.org/wiki/momma
As I said, I am not a native speaker, so I don't really know how momma is typically used (if at all). It was more of a spontaneous use on a whim. But I also haven't found any indication yet that it is a derogatory term.
Sorry I still think the "offense taken" is overblown. I am also not concerned about not offending anybody at all. Frankly I think many people who feel offended about certain things perhaps should just get over themselves. I mean in this case, is momma used in the real world? If so, then I think it should be OK to use it. I don't believe in censoring statements about the real world.
Thanks for trying to explain, though.